Lot brown



(No Model.) 4 Sheets-Sheet 1.

- 0.13. L. BROWN.

METHOD OF WINDING DYNAMO ARMATURES. No. 441,391. Patented Nov. 25, 1890.

Wz'hzesses; fnmmlz (N0 Mbdel.) 4 Sheets-Sheet. 2.

- G. E. L. BROWN.

METHOD OF WINDING'DYNAMO ARMATURBS.

No. 441,891. Patented Nov. 25, 1890.

(No Model.) 7 V 4 Sheets-Sheet 3.

- 0. E. L. BROWN.

METHOD OF WINDING DYNAMD ARMATURE'S. No. 441,391. I Patented Nov. 25,1890.

wines; t: five/infomza/ Y 44,; Ma W THE NORRIS PETERS cm. muvmumuvusmnmnu, o. c.

' (No Model;) v 4 Sheets-Sheet: 4.

.0. E. L. BROWN, METHOD OF WINDING DYNAMO ARMATURES. N0. 441,391.

Patented Nov. 25, 1890.

In vmir:

UNITED STATES PATENT OFFICE.

METHOD OF WINDING DYNAMO-ARMATURES.

SPECIFICATION forming part of Letters Patent No.

441,391, dated November 25, 1890.

Application filed February 5, 1890. Serial No. 339,322- (No model.)

To all whom it may concern:

Be it known that I, CHARLES EUeEN LANCE- LOT BROWN, a subject of theQueen of England, residing at Zurich, Unterstrass, in Switzerland, haveinvented a certain new and useful Method of Winding Dynamo=Armatures forDynamo-Machines, of which the following is a specification.

There exists a great disadvantage in armatures of the drum type woundwith the ordinary Siemens winding, especially when constructed to give ahigh tension-viz., wires which lie side by side have momentarily thefull difference of potential between them which the machine can give. Onthis account there is great danger of the insulation giving way after atime owing to deposits of dust, particles of copper from the brushes,&c., being formed between the wires. Even when the latter are separatedin the dangerous parts by thick insulation the danger is not entirelyavoided, as the insulation does not form a continuous covering, butbecomes bridged over in time by the above mentioned deposits of dust,grease, &c. In order to completely avoid this disadvantage ofdrum-armatures, I have devised a new system of windin In theaccompanying drawings, Figure 1 is a diagrammatical view of the ordinarydrumwinding. Fig. 2 is a diagrammatical view of my improvedarmatureAvinding. Fig. 3 is a diagrammatical View showing a modificationof the method of winding. Fig. 43 is a detail sectional view showing themethod of applying the upper wire layers of the same. Fig. 5 is an endperspective View of the armature shown in section in Fig. 2, parts beingbroken out and others in section; and Fig.6 is an end perspective viewof the armature shown in section in Fig. 3, parts being broken out andothers in section.

Similar figures of reference indicate corresponding parts.

The wires are numbered at the periphery 1 to 20 consecutively, theposition of the brushes being, for example, indicated in the drawings. Asimple inspection will show that between the wires 6 and 7 and 16 and17, the same difference of potential exists as between the twobrushes-i. a, the maximum while between the wires 5 and 7, 6 and 8,15and 17, or 16 and 18 the tension corresponds to that existing betweentwo neighboring sections of the collector. While, then, between twowires bearing consecutive numbers the tension attains a maximum twice ineach revolution of the armature, the tension between any two neighboringwires which bear even numbers,

or two which bear odd numbers, is never higher than that which existsbetween two consecutive collector-bars. On the other hand, according tothe system I have invented,

an armature, as shown in Fig. 2 diagrammatically and in Fig. 5 inperspective, is wound in the following manner: I put in place first allthe wires carrying, say, uneven numbers, taking care that the totalnumber of the wires and the circumference of the drum may have such arelation to one another that the Wires entirely cover the exteriorcylindrical surface of the drum. I afterward cover this first layer witha continuous sheet of insulation, which extends over the whole surface,including the ends or side faces of the drum, as shown in Figs. 2 and 5,of athickness corresponding to the tension of the machine. Above this Iput the second layer of the winding-Wm, the wires bearing even numbers.I obtain in this manner a drum wound with two layers of wire with thepeculiarity that between two neighboring wires of one and the same layerthere exists only a very small tension, while the two layers areinsulated from one another as thickly as may be desired. In addition tothis the insulation wound round upon the first layer of wires serves atthe same time to bind them together and permits the final bandagesoutside the complete armature to be considerably weaker.

At first glance it may seem an objection 0 that an armature Wound asabove described must always possess two layers of wire. Armatures ofl1ightension machines, however, even when wound with ordinary winding,generally possess two layers of wire, and when my system is used thewires may have such a cross section orbe connected parallel in such awaythat a reduced height of the winding may be obtained, although twolayers are used. In special cases where two layers can- I00 not beemployed I may modify my method of winding as follows: I wind the firstlayer of wire in such a way as to leave between two consecutive wires aspace corresponding to the size of the wire, togetherwith twice thethick- &c., setting up communication between wires ness of the requiredinsulation. Above this belonging to two different parts of the wind- 2first layer I place the insulating-covering in a ing. loose manner, andafterward put in place the It is evident that this method of winding 5second layer of wires, pressing them down on is applicable not only totwo-pole machines, the insulation in the space left between the but tomachines with any number of poles wires of the first layer. In themethod of and to a drum-winding in series or parallel. 3 winding(schematically shown in Fig. 3 and Having thus described my invention, Iperspective in Fig. 6) the wires are drawn claim as new and desire tosecure by Letters IO as if being farther apart from one anotherPatentthan they really are, while the manner of in- The method ofwinding dynamo-armatures, serting the upper wire layers is representedconsisting in winding one layer of wires upon 33 by Fig. 4. the drum,placing a suitable continuous insu- It will easily be seen that thewhole windlation upon said layer of wires, and then wind- 15 ing of thearmature is divided into two dising a second layer of wires upon theinsulatinct parts by a continuous layer of insulation, substantially asset forth. tion,which separates the wires between which In testimonywhereof I hereunto sign my 4c a high tension exists for the whole oftheir name, in the presence of two subscribing witlength from oneanother. This continuity of nesses, this 15th day of January, 1890.

20 the insulating-layer constitutes the principal CHARLES EUGIJNLANCELOT BROWN.

part in my improvement, for it is precisely Witnesses: this continuityof the insulation which pre- EMIL BLUM,

vents an accumulation of copper dust, grease, II. LABHART.

